Framed in pink, the DontDateHimGirl.com site allows a woman to post the name and photograph of a man she says has wronged her, along with a short but often pungent synopsis of how precisely she was aggrieved. The suspicious or merely curious can hunt for a cheater by typing a name into the search engine. Women can also send e-mail messages through the site if they want to ask more pointed questions about a particular cad. In a slight nod to fairness, men who disagree with the characterization can write a rebuttal to be posted alongside their names.

ManHater.com ("we don't hate all men, just the jerks!") uses a questionnaire to rate men. TrueDater.com searches particular personal ad profiles on people who've posted to matching sites like eHarmony, Match.com, Nerve or Yahoo! Personals - specifically correcting any erroneous information posted in the ad. That one, above all others, seems like a good stop before you arrange to meet someone you're corresponding with through a personal ad.